Help me out... Limp mode, P325F

BimmerHausPerformance · 09-14-2019, 11:16 PM

Cycling the car on and off works, but it's happened twice in the last two days... cruzing down the freeway, step on it in a 5th or 6th, not even high RPMs and fuel cuts off kinda hard-like, and i'm in limp mode. I found this since it's not a generic OBDII code, but a manufacturer specific code:
"Plausibility monitoring of the relative fuel mass"

Which I think means I lost fuel pressure? Not sure... but I did read several guys with tunes disable all of these "Plausibility" codes that will take your car into limp mode.

Thoughts anyone?

I'm currently running a 02 simulator due to catless DP to not throw a CEL. So I've manually set my 02 output back to the ECU as rich as I can get it without throwing a CEL as well.

I was thinking to just go get JB4 to be able to control more parameters and monitor things a bit better, like fuel.

ziekxq · 09-15-2019, 12:41 PM

It is either rail pressure sensor or fuel pump.

BimmerHausPerformance · 09-15-2019, 02:34 PM

LPFP or HPFP? Any easy diagnosis or just take it into a shop and have them check it out? Would this not be caused by my mods and the fact I don't have a tune?

Wagner FMIC knockoff
AFE Scorcher chip
BMS Intake
Catless DP
Full exhaust
O2 sensor simulator (set signal being sent to ECU for fuel)

Bmw doubles · 09-15-2019, 07:33 PM

There's a recall for the lpfp so that's a free fix at your dealer. Tell them replace it and don't flash my car.

Unlikely to be fuel rail sensor but you never know and HPFP fuel failure is another code.

Other forms mention this error and relate it to poor comms to the ecu caused by low voltage. Check your battery voltage.

ziekxq · 09-15-2019, 08:07 PM

You have AFE scorcher ship... That is a tune lol. Don't waste money on JB4 go straight to MHD or BM3.

BimmerHausPerformance · 09-16-2019, 11:44 AM

Quote:

Originally Posted by ziekxq

You have AFE scorcher ship... That is a tune lol. Don't waste money on JB4 go straight to MHD or BM3.

It's not a tune that works with the ECU in unison with my other mods that would prevent codes, that's more of what I meant. I read a lot about how jb4 works WITH MHD and that's why I was leaning towards doing both starting with the jb4... thoughts?

335nista · 05-24-2021, 12:33 AM

Quote:

Originally Posted by BrowBMW

Cycling the car on and off works, but it's happened twice in the last two days... cruzing down the freeway, step on it in a 5th or 6th, not even high RPMs and fuel cuts off kinda hard-like, and i'm in limp mode. I found this since it's not a generic OBDII code, but a manufacturer specific code:
"Plausibility monitoring of the relative fuel mass"

Which I think means I lost fuel pressure? Not sure... but I did read several guys with tunes disable all of these "Plausibility" codes that will take your car into limp mode.

Thoughts anyone?

I'm currently running a 02 simulator due to catless DP to not throw a CEL. So I've manually set my 02 output back to the ECU as rich as I can get it without throwing a CEL as well.

I was thinking to just go get JB4 to be able to control more parameters and monitor things a bit better, like fuel.

Did you ever figure out the problem I'm having the same thing

BimmerHausPerformance · 05-24-2021, 06:48 AM

Quote:

Originally Posted by 335nista

Quote:

Originally Posted by BrowBMW

Cycling the car on and off works, but it's happened twice in the last two days... cruzing down the freeway, step on it in a 5th or 6th, not even high RPMs and fuel cuts off kinda hard-like, and i'm in limp mode. I found this since it's not a generic OBDII code, but a manufacturer specific code:
"Plausibility monitoring of the relative fuel mass"

Which I think means I lost fuel pressure? Not sure... but I did read several guys with tunes disable all of these "Plausibility" codes that will take your car into limp mode.

Thoughts anyone?

I'm currently running a 02 simulator due to catless DP to not throw a CEL. So I've manually set my 02 output back to the ECU as rich as I can get it without throwing a CEL as well.

I was thinking to just go get JB4 to be able to control more parameters and monitor things a bit better, like fuel.

Did you ever figure out the problem I'm having the same thing

It was so long ago I don't remember. I went MHD and never had the problem again. Sorry!!

335nista · 05-24-2021, 09:22 AM

Quote:

Originally Posted by BrowBMW

Quote:

Originally Posted by 335nista

Quote:

Originally Posted by BrowBMW

Cycling the car on and off works, but it's happened twice in the last two days... cruzing down the freeway, step on it in a 5th or 6th, not even high RPMs and fuel cuts off kinda hard-like, and i'm in limp mode. I found this since it's not a generic OBDII code, but a manufacturer specific code:
"Plausibility monitoring of the relative fuel mass"

Which I think means I lost fuel pressure? Not sure... but I did read several guys with tunes disable all of these "Plausibility" codes that will take your car into limp mode.

Thoughts anyone?

I'm currently running a 02 simulator due to catless DP to not throw a CEL. So I've manually set my 02 output back to the ECU as rich as I can get it without throwing a CEL as well.

I was thinking to just go get JB4 to be able to control more parameters and monitor things a bit better, like fuel.

Did you ever figure out the problem I'm having the same thing

It was so long ago I don't remember. I went MHD and never had the problem again. Sorry!!

Dam well that's okay, just trying to do some digging , people are telling me I need a whole new dme

BimmerHausPerformance · 05-24-2021, 02:06 PM

Quote:

Originally Posted by 335nista

Quote:

Originally Posted by BrowBMW

Quote:

Originally Posted by 335nista

Quote:

Originally Posted by BrowBMW

Cycling the car on and off works, but it's happened twice in the last two days... cruzing down the freeway, step on it in a 5th or 6th, not even high RPMs and fuel cuts off kinda hard-like, and i'm in limp mode. I found this since it's not a generic OBDII code, but a manufacturer specific code:
"Plausibility monitoring of the relative fuel mass"

Which I think means I lost fuel pressure? Not sure... but I did read several guys with tunes disable all of these "Plausibility" codes that will take your car into limp mode.

Thoughts anyone?

I'm currently running a 02 simulator due to catless DP to not throw a CEL. So I've manually set my 02 output back to the ECU as rich as I can get it without throwing a CEL as well.

I was thinking to just go get JB4 to be able to control more parameters and monitor things a bit better, like fuel.

Did you ever figure out the problem I'm having the same thing

It was so long ago I don't remember. I went MHD and never had the problem again. Sorry!!

Dam well that's okay, just trying to do some digging , people are telling me I need a whole new dme

I would definitely flash MHD first. Are you 100% stock? Have an Indy do a diagnostic test?

335nista · 05-25-2021, 12:51 PM

Quote:

Originally Posted by BrowBMW

Quote:

Originally Posted by 335nista

Quote:

Originally Posted by BrowBMW

Quote:

Originally Posted by 335nista

Quote:

Originally Posted by BrowBMW

Cycling the car on and off works, but it's happened twice in the last two days... cruzing down the freeway, step on it in a 5th or 6th, not even high RPMs and fuel cuts off kinda hard-like, and i'm in limp mode. I found this since it's not a generic OBDII code, but a manufacturer specific code:
"Plausibility monitoring of the relative fuel mass"

Which I think means I lost fuel pressure? Not sure... but I did read several guys with tunes disable all of these "Plausibility" codes that will take your car into limp mode.

Thoughts anyone?

I'm currently running a 02 simulator due to catless DP to not throw a CEL. So I've manually set my 02 output back to the ECU as rich as I can get it without throwing a CEL as well.

I was thinking to just go get JB4 to be able to control more parameters and monitor things a bit better, like fuel.

Did you ever figure out the problem I'm having the same thing

It was so long ago I don't remember. I went MHD and never had the problem again. Sorry!!

Dam well that's okay, just trying to do some digging , people are telling me I need a whole new dme

I would definitely flash MHD first. Are you 100% stock? Have an Indy do a diagnostic test?

I'm 100% stock looking to mod though and trying to sort out problems , you suggest just going mhd stage 1 or still stage 0

BimmerHausPerformance · 05-25-2021, 11:21 PM

Well, mhd is cheaper than a new dime! And if you are gonna mod anyway, worth a try.

09-14-2019, 11:16 PM	#1
BimmerHausPerformance Major 513 Rep 1,442 Posts Drives: 2011 535i 6MT Join Date: Apr 2019 Location: Chattanooga iTrader: (1) Garage List 2011 BMW 535i [0.00]	Help me out... Limp mode, P325F Cycling the car on and off works, but it's happened twice in the last two days... cruzing down the freeway, step on it in a 5th or 6th, not even high RPMs and fuel cuts off kinda hard-like, and i'm in limp mode. I found this since it's not a generic OBDII code, but a manufacturer specific code: "Plausibility monitoring of the relative fuel mass" Which I think means I lost fuel pressure? Not sure... but I did read several guys with tunes disable all of these "Plausibility" codes that will take your car into limp mode. Thoughts anyone? I'm currently running a 02 simulator due to catless DP to not throw a CEL. So I've manually set my 02 output back to the ECU as rich as I can get it without throwing a CEL as well. I was thinking to just go get JB4 to be able to control more parameters and monitor things a bit better, like fuel.
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09-15-2019, 12:41 PM	#2
ziekxq Major 320 Rep 1,299 Posts Drives: 2011 535i xDrive Join Date: Feb 2016 Location: United States iTrader: (0)	It is either rail pressure sensor or fuel pump.
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09-15-2019, 02:34 PM	#3
BimmerHausPerformance Major 513 Rep 1,442 Posts Drives: 2011 535i 6MT Join Date: Apr 2019 Location: Chattanooga iTrader: (1) Garage List 2011 BMW 535i [0.00]	LPFP or HPFP? Any easy diagnosis or just take it into a shop and have them check it out? Would this not be caused by my mods and the fact I don't have a tune? Wagner FMIC knockoff AFE Scorcher chip BMS Intake Catless DP Full exhaust O2 sensor simulator (set signal being sent to ECU for fuel)
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09-15-2019, 07:33 PM	#4
Bmw doubles Dream crusher 984 Rep 2,421 Posts Drives: Fast Join Date: Mar 2015 Location: westside iTrader: (0) Garage List 2011 535 [0.00]	There's a recall for the lpfp so that's a free fix at your dealer. Tell them replace it and don't flash my car. Unlikely to be fuel rail sensor but you never know and HPFP fuel failure is another code. Other forms mention this error and relate it to poor comms to the ecu caused by low voltage. Check your battery voltage. __________________ 535i MIssion Performance, PS2, Helix HPFP Kit, Wagner FMIC, Spec 3 clutch, Steel SMF, Wolf Racing CP, UUC SSK, GFB dv, SprintBooster, Custom Dynomax Exhaust, M5 Sways, Eibach OE Springs, Koni Sports Adjustable, Custom Short Ram CAI IG: @bmwdoubles
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09-15-2019, 08:07 PM	#5
ziekxq Major 320 Rep 1,299 Posts Drives: 2011 535i xDrive Join Date: Feb 2016 Location: United States iTrader: (0)	You have AFE scorcher ship... That is a tune lol. Don't waste money on JB4 go straight to MHD or BM3.
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05-25-2021, 11:21 PM	#12
BimmerHausPerformance Major 513 Rep 1,442 Posts Drives: 2011 535i 6MT Join Date: Apr 2019 Location: Chattanooga iTrader: (1) Garage List 2011 BMW 535i [0.00]	Well, mhd is cheaper than a new dime! And if you are gonna mod anyway, worth a try. __________________ 2011 F10 S55 6MT Website Insta @bimmerhausperformance YouTube
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